Of the following firms, pick the one that is most likely to be the most profitable.

A$.$ Firm $A$ is in a higly competitive industry with low barriers to entry and many sustitutes for thier product

$B.$ Firm $B$ is in a market with high barriers to entry and several substitutes exist for its products

C$.$ Firm $C$ is in a market with high barriers to entry and has a unique product

D$.$ Firm D is in a makret with high barriers to entry and exit and has low risk assets.

E$.$ Firms A and $D$ are just as likely to be profitable

F$.$ Firms $C$ and $D$ are just as likely to be profitable